JP2008063767A - Sandbag for civil engineering - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sandbag for civil engineering, which hardly causes a breaking phenomenon due to the separation of fabrics from each other, by preventing the ultraviolet ray degradation of a sewing thread of a sewed part to the utmost. <P>SOLUTION: In this sandbag A for civil engineering, a hanging belt 2 is sewed to a base fabric bag body 1, and the sewed part of the overlapping portion of the base fabric bag body 1 is covered with the hanging belt 2. More specifically, the base fabric bag body 1 is cylindrically formed by sewing ends of one rectangular base fabric together in the state of making the ends overlap each other by a fixed width; the four hanging belts 2 are sewed to the periphery of the base fabric bag body in the state of rising from a bottom; and the sewed part of the overlapping portion is covered with one of the hanging belts 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a civil engineering sandbag used for civil engineering work on coasts, rivers, lakes, ponds, roads, and the like, and more specifically, for civil engineering that can prevent damage (breaking) after construction as much as possible by preventing strength deterioration due to ultraviolet rays. Concerning sandbags.

Conventionally, civil engineering sandbags have been used in various places for construction in which civil engineering works on coasts, rivers, lakes, ponds, roads, etc. are filled with earth and sand.
Such a civil engineering sandbag is made of, for example, a knitted fabric, a woven fabric, and a net fabric formed using fiber yarns, and these fabrics are sewn to form a three-dimensional bag body.
As materials for civil engineering sandbags, synthetic fibers that are resistant to moisture, for example, polyester, polypropylene, polyethylene, nylon, or polyvinyl chloride are mainly used (see, for example, Patent Document 1).
Of the synthetic fibers, in particular, bags obtained by sewing a cloth in which a polypropylene fiber is roughly woven into a plain weave are used.

Japanese Utility Model Publication No. 6-34026

  However, for example, some of these sandbags for civil engineering are piled up at the construction site and then the seams are torn. As a result, the padding material such as earth and sand and stones packed in the bag is exposed to the outside. There was a problem of being discharged.

It is made by making a rectangular base fabric into a cylindrical shape and sewing the overlapped parts at both ends (the joint strength is generally weak unlike the basement floor of the base fabric because it is sewn with sewing thread). The civil engineering sandbags torn are often torn from this sewn portion.
The reason is that when the seam thread (made of synthetic fiber such as polypropylene fiber, nylon fiber, polyester fiber, etc.) at the overlapped portion is exposed to ultraviolet rays, a deterioration phenomenon occurs.

The sewing thread that has deteriorated over time due to receiving ultraviolet rays or the like cannot maintain the original strength, and as a result, when internal / external pressure is applied to the civil engineering sandbag after construction, the sewing thread breaks and breaks.
More specifically, since the overlapped portion is sewn with a sewing thread, the bond strength is generally weaker than the ground tissue portion of the base fabric bag body.
And a cylindrical base cloth bag body will apply big force to a side wall surface in the state with which earth and sand etc. were filled inside.

For this reason, when the sewing thread is deteriorated by ultraviolet rays and cut at the stitched portion of the overlapping portion, the cloths of the overlapping portion are separated from each other and opened, and the civil engineering sandbag itself is torn (breaking phenomenon).
Even if it is a civil engineering sandbag used for temporary construction, it is necessary to prevent such a tearing phenomenon from occurring as much as possible.

The present invention has been made based on such a background.
That is, an object of the present invention is to provide a civil engineering sandbag that prevents the deterioration of the sewing thread at the sewing portion as much as possible and prevents the tearing phenomenon caused by the separation of the cloths.

  Thus, as a result of intensive research on the background of such problems, the present inventor has found that deterioration due to ultraviolet rays is reduced by covering the stitched portion of the overlapping portion, and the present invention is based on this finding. Was completed.

  That is, the present invention is (1) a civil engineering sandbag in which a suspension belt is sewn to a base cloth bag body, and the sewing portion of the overlapping portion of the base cloth bag body is covered with the suspension belt. Exist.

  In the present invention, (2) the base cloth bag body is a cylindrical shape in which the ends of one rectangular base cloth are overlapped with each other with a predetermined width, and the suspension belt is arranged around the base cloth bag body. In the civil engineering sandbag described in (1) above, a plurality of stitches are sewn up from the bottom, and the stitched portion of the overlapping portion is covered by one suspension belt.

  Moreover, this invention exists in the sandbag for civil engineering characterized by the above-mentioned (1) description which has a connection part to which the said suspending belt attaches a connection rope.

  Moreover, this invention exists in the sandbag for civil engineering of the said (1) description whose said connection part is a loop and a connection rope is penetrated by this loop.

  Moreover, this invention is (5) The said connection part forms space between the base fabric bag body and the suspension belt, A connection rope is penetrated to this space, The said (1) description Located in civil engineering sandbags.

  Moreover, this invention is (6) Said (1) description that the said connection part formed the notch which forms a space between a base fabric bag body and a suspension belt, and also penetrates a connection rope in a suspension belt. Existing in civil engineering sandbags.

  Moreover, this invention exists in the sandbag for civil engineering of the said (1) description which (7) the said connection part is a ring attached as a separate body to a suspension belt, and inserts a connection rope in this ring.

  Moreover, this invention exists in the sandbag for civil engineering of said (1) description with which (8) the said connection part is provided in at least one other than the suspension belt which covers the sewing part of an overlap part.

  In addition, as long as the objective of this invention is met, the structure which combined the said (1) to (8) suitably is also employable.

In the sandbag for civil engineering of the present invention, the stitched portion of the overlapped portion is covered with the suspension belt, so that the seam is protected from ultraviolet rays and shielded, and strength deterioration is prevented.
Since the civil engineering sandbag suspension belt has a connecting portion to which the connecting rope is attached, a large number of civil engineering sandbags can be integrated.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing an embodiment of a civil engineering sandbag A according to the present invention.
Fig. 1 (A) shows a civil engineering sandbag A before the filling material is put in, and Fig. 1 (B) shows a civil engineering sandbag A after the filling material is put in.

The civil engineering sandbag A includes a base fabric bag body 1, a suspension belt 2, and a mouth-drawing rope 3.
As shown in FIG. 2, the civil engineering sandbag A according to the present embodiment is made by first forming a base fabric bag body 1 into a cylindrical shape of a rectangular base fabric, and overlapping the end portions with a constant width (FIG. 2). (See (A)), and sew the overlapped part.
Next, a bottom cloth is sewed on the bottom of the base cloth bag body 1 so as to have a bottom (see FIG. 2B).

On the other hand, the suspension belt 2 is sewn so as to be orthogonal to the bottom portion of the base fabric bag body 1, and a plurality (four in the figure) are attached to the periphery (side wall surface) so as to rise from the bottom portion.
Of the four suspension belts, two are connected together to form a handle 22 for lifting the entire civil engineering sandbag A.
In the drawing, an example in which the suspension belt 2 is one endless as a whole is shown.
For attachment at the bottom, the suspension belt 2 may be sewn entirely to the base fabric bag body 1 or may be sewn at several places.

The portion where the suspension belt 2 is attached to the side wall surface of the base fabric bag body 1 is from the bottom surface of the base fabric bag body 1 to a certain height position, and the upper height portion is filled with stone or earth and sand. It becomes the mouth restrictor 1A which becomes a lid after throwing the material.
After filling with the filling material, the mouthpiece rope 3 is attached to the mouthpiece portion 1A of the base fabric bag body 1 in order to narrow down the mouthpiece portion 1A.

In the present embodiment, the suspension belt 2 is formed in an endless shape and is attached so as to be orthogonal to the bottom surface of the base fabric bag body 1. The mouth throttle portion 1A of the base fabric bag body 1 is throttled by the mouth throttle rope 3 (FIG. 1). (Refer) When the civil engineering sandbag A into which the filling material is put is lifted, the base fabric bag body 1 is pressed by the suspension belt 2 from the periphery toward the inside.
The pressing action by the suspension belt 2 exerts a shape retaining effect, and the deformation of the base fabric bag body 1 into which the filling material is put is suppressed.
As a result, the stability when the civil engineering sandbag A is lifted increases, so that the civil engineering sandbag A can be transported safely and reliably.

Now, in the overlapping portion W of the base fabric bag body 1, the suspension belt 2 is attached so as to cover the sewing portion T.
This is a major feature of the present invention.
Here, the relationship between the base fabric bag body 1 and the suspension belt 2 will be described.
As described above, the base fabric bag body 1 is formed by sewing the overlapped portion W, in which both ends of a rectangular cloth material are overlapped with a certain width, with a sewing thread.

When the sewing thread is exposed to ultraviolet rays and its strength is reduced, the overlapped portion W is released and opened.
Therefore, in the present invention, the sewing portion T of the overlapping portion W is covered with the suspension belt 2.
That is, the suspension belt 2 is positioned and attached so as to correspond to the sewing portion T (seam) of the overlapping portion W.

In this case, the suspension belt 2 has a size that sufficiently covers the sewing portion T of the overlapping portion W, and is attached by sewing so that the suspension belt 2 does not move.
Incidentally, at least one of the suspension belts 2 is always located at the sewing portion T of the overlapping portion W, and the attachment positions of the other three suspension belts 2 are determined based on this position.

The four suspension belts 2 are vertically attached to the side surfaces, but one of the four belts may be in contact with the overlapping portion W described above.
For attachment to the remaining three side wall surfaces, a method of sewing a certain portion on the side wall surface is employed.

Another feature of the present invention is that it can be easily connected to another civil engineering sandbag.
That is, the connection part 21 is formed in the civil engineering sandbag A using the suspension belt 2.
As described above, the suspension belt 2 is attached to the side wall surface of the base fabric bag body 1, and at the same time, the connecting portion 21 is formed.

The connecting portion 21 is extremely useful because a large number of civil engineering sandbags A can be connected via the connecting rope 4.
FIG. 3 shows the connection portion 21 formed by forming a space S between the base fabric bag body 1 and the suspension belt 2.
FIG. 3A shows a state before connection, and FIG. 3B shows a state after connection.
The space S is formed by sewing the suspension belt 2 at two upper and lower portions at regular intervals, and the connecting rope 4 is inserted into the space S.

FIG. 4 shows that the connecting portion 21 is formed by forming a notch K having a space S between the base cloth bag body 1 and the suspension belt 2 and through which the connection rope 4 is inserted into the suspension belt 2.
FIG. 4A shows a state before connection, and FIG. 4B shows a state after connection.
In this case, unlike FIG. 3, the space S is formed by sewing only the upper side of the suspension belt 2, and the connecting rope 4 is inserted into the space S and the notch K.

FIG. 5 shows what the connecting portion 21 has as a loop.
FIG. 5A shows a state before connection, and FIG. 5B shows a state after connection.
Even if the loop is given to the suspension belt 2 at the time of manufacture, it is preferable.
The connecting rope 4 is inserted into this loop.

FIG. 6 shows that the connecting portion 21 is constituted by a separate ring body R attached to the suspension belt 2.
FIG. 5A shows a state before connection, and FIG. 5B shows a state after connection.
As the ring body R into which the connecting rope 4 is inserted, a metal ring, a fiber string ring, a plastic ring, or the like is employed.

  In addition, in the sewing of the suspension belt 2 and the base cloth bag body 1 shown in FIGS. 3 to 6, it is also meant for reinforcement that the suspension belt 2 is sewn to a part of the base cloth bag body 1 through a cloth. It is valid.

These connecting portions 21 described above need to be provided on the suspension belt 2 other than the suspension belt 2 located in the overlapping portion W described above.
And it adapts to at least one suspension belt 2 among the three belts.
FIG. 7 is a schematic view showing an embodiment in which the suspension belt 2 is provided with a connecting portion 21 (here, the connecting portion 21 shown in FIG. 3).
FIG. 7 (A) shows the state of connection with the other sandbag for civil engineering (one-dot chain line) before the filling material is inserted, and FIG. 7 (B) shows.

FIG. 8 is a diagram for explaining the application position of the connecting portion 21.
FIG. 8A shows one suspension belt having a connection portion, FIG. 8B shows two suspension belts having a connection portion, and FIG. 8C shows three suspension belts. Each having a connecting portion.
In the suspension belt 2 that does not have the connecting portion 21, the sewing portion T of the overlapping portion W of the base fabric bag body 1 is covered with the suspension belt 2.

FIG. 9 is an explanatory diagram showing a construction example in which civil engineering sandbags are connected to form a group.
By providing the connecting portions 21 as described above, a large number of civil engineering sandbags can be connected. In this example, the case where the connecting portions 21 are provided on one suspension belt 2 is shown.

In this case, it is preferable to apply when the direction of the civil engineering sandbag is constant.
FIG. 10 shows another construction example in which civil engineering sandbags are connected to form a group.
In this example, the case where the connecting portions 21 are provided on all the suspension belts 2 other than the suspension belt 2 located in the overlapping portion W (that is, three) is shown.

Since there are many connecting parts 21, there is a degree of freedom in the places where the connecting ropes 4 are connected, and even if the direction of the individual civil engineering sandbags is random as shown in the figure, it is possible to connect using the connecting parts 21 in the adjacent positions. is there.
For reference, FIG. 11 schematically shows a construction example in which civil engineering sandbags A are stacked and connected in the vertical and horizontal directions.
FIG. 11A is a perspective view, and FIG. 11B is a side view.
In the above example, since the civil engineering sandbags are constructed as a group, the whole can be held integrally, and it is excluded that only one civil engineering sandbag is displaced.

By the way, a synthetic fiber is preferably used for the material of the base fabric bag body 1, the suspension belt 2, the mouth-drawing rope 3 or the connecting rope 4 described above.
As the synthetic fiber, for example, polyester, polypropylene, polyethylene, polyamide or the like is used.
These are used as thread forms such as multifilaments, monofilaments, film yarns, etc., and bags, strings, belts, ropes, etc. are made by weaving or knitting.

In order to make the civil engineering sandbag of the present invention more resistant to ultraviolet rays, the synthetic fibers constituting the base fabric bag body 1 may contain an ultraviolet shielding agent.
As the ultraviolet shielding agent, a reflective agent or an absorbent is employed.
Examples of the reflective agent include carbon black, iron oxide, chromium oxide, lead oxide, zinc oxide, magnesium oxide, titanium oxide, calcium carbonate, and barium sulfate. Absorbents include phenyl salicylate, hydroxybenzophenone, benzo There are triazole-based absorbents.

When the synthetic fiber contains an ultraviolet shielding agent, the amount of ultraviolet rays absorbed by the synthetic fiber itself is reduced, and deterioration of the strength of the cloth of the base fabric bag body 1 can be suppressed.
The synthetic fiber can be easily incorporated with an ultraviolet shielding agent, for example, by kneading the ultraviolet shielding agent during spinning of the raw yarn.

Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that other various modifications are possible without departing from the essence thereof.
For example, in the above-described embodiment, the example in which the base fabric bag body 1 has a cylindrical shape has been described. However, as long as there is an overlapping portion, a rectangular tube shape or other cylindrical shapes may be used.

Further, for example, in the above-described embodiment, the example in which the suspension belt 2 is formed in an endless shape and attached orthogonally on the bottom surface of the base fabric bag body 1 has been described, but a plurality of belts are appropriately attached to the base fabric bag body 1. It is also possible to connect the end portions to form the handle 22.
The connecting rope can naturally be made of a material other than fiber (for example, a metal rope, a plastic rope, etc.).
Of course, even an even number of four or more rising suspension belts can be employed.

FIG. 1 is an explanatory view showing an embodiment of a civil engineering sandbag according to the present invention. FIG. 1 (A) shows a civil engineering sandbag before the filling material is inserted, and FIG. The sandbag for civil engineering after putting the stuffing material is shown. FIG. 2 is a diagram for explaining how to make a civil engineering sandbag. FIG. 3 shows the connecting portion formed by forming a space between the base fabric bag body and the suspension belt, FIG. 3 (A) shows the state before connection, and FIG. 3 (B) shows the state after connection. Indicates the state. FIG. 4 shows that the connecting portion is formed by forming a notch through which a connecting rope is inserted into the suspension belt, having a space between the base fabric bag body 1 and the suspension belt, and FIG. The state before the connection is shown, and FIG. 4B shows the state after the connection. FIG. 5 shows what a connection part has by having a loop, FIG. 5 (A) shows the state before connection, and FIG. 5 (B) shows the state after connection. FIG. 6 shows what a connection part consists of a separate ring body attached to the suspension belt, FIG. 6 (A) shows the state before connection, and FIG. 6 (B) shows the state after connection. FIG. 7 is a schematic view showing an embodiment in which a suspension belt is provided with a connecting portion. FIG. 7 (A) shows a state before inserting filling material, and FIG. 7 (B) shows another civil engineering sandbag. The connection state of is shown. FIG. 8 is a diagram for explaining the application positions of the connecting portions. FIG. 9 is an explanatory view showing a construction example in which civil engineering sandbags are connected to form a group. FIG. 10 is a diagram illustrating another construction example in which civil engineering sandbags are connected to form a group. FIG. 11 schematically shows an example of construction in which sandbags A for civil engineering are stacked and connected in the vertical direction and the horizontal direction, (A) is a perspective view, and (B) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base cloth bag 1A ... Mouth restricting part 2 ... Hanging belt
DESCRIPTION OF SYMBOLS 21 ... Connection part 22 ... Handle 3 ... Mouth-drawing rope 4 ... Connection rope A ... Civil engineering sandbag K ... Notch S ... Space R ... Ring body T ... Sewing part W ... Overlapping part

Claims (8)

  A civil engineering sandbag in which a suspension belt is sewn to a base cloth bag body, and a sewing portion of the overlapping portion of the base cloth bag body is covered with the suspension belt.   The base fabric bag body is a cylindrical shape with the ends of a rectangular base fabric overlapped with a certain width and sewed into a cylindrical shape. The sandbag for civil engineering according to claim 1, wherein the seam portion of the overlapping portion is covered by one of the suspension belts.   The civil engineering sandbag according to claim 1, wherein the suspension belt has a connecting portion to which a connecting rope is attached.   The civil engineering sandbag according to claim 1, wherein the connecting portion is a loop, and a connecting rope is inserted through the loop.   The civil engineering sandbag according to claim 1, wherein the connecting portion forms a space between the base fabric bag body and the suspension belt, and a connecting rope is inserted into the space.   The civil engineering sandbag according to claim 1, wherein the connecting portion is formed by forming a space between the base fabric bag body and the suspension belt and further forming a notch through which the connection rope is inserted into the suspension belt.   The civil engineering sandbag according to claim 1, wherein the connecting portion is a ring attached to the suspension belt as a separate body, and a connecting rope is inserted through the ring.   The civil engineering sandbag according to claim 1, wherein the connecting portion is provided in at least one other than the suspension belt that covers the sewing portion of the overlapping portion.

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